Wall anchoring device



March 11, 1952 R. M. JAMES WALL ANCHORING DEVICE Filed March 29, 1949 Ef -E27 far Babe/ Maxwell dmes 247% Patented Mar. 11, 1952 "UNITED STATES PATENT OFFICE WALL ANCHORING DEVICE Robert Maxwell'James, Buffalo, N. Y.

Application March 29, 1949, Serial No. 84,063

Claims. 1

This invention relates generally to a new and improved method for adapting hardened plastic structures such as concret forms and the like for architectural treatment. More particularly, the present invention contemplates the provision of an anchorage device which can be advantageously employed in connection with undercut and dovetailed niches or recesses formed in concrete surfaces.

An anchoragedevice constructed in accordance with the provisions of the present invention includes a shank member which may be formed in such a manner as to define suitable anchorage for supplementary construction materials used in connection with concrete walls or other forms of hardened plastic material.

In one useful embodiment, the shank takes the form of a strip of metal which defines a corrugated pattern along its length and a flattened apertured crown at one end.

A pair of bifurcated fiukes, more specifically, a pair of members each having a fiat apertured base and a pair of substantially triangular shaped arms extending away from said base on angularly disposed planes intersecting the plane of the base is provided for seating within an undercut dovetailed recess formed by a removable button-type core.

tions of the flukes and suitable fastening means may be passed through the fiukes and the shank member to place the complete anchorage device in a locked-together firm assembly.

The arms of each of the aforementioned fiukes are provided with an acutely inclined inner edge in order that the arms may develop a substantially conical shaped bearing surface for cooperative locking engagement with a correspondingly shaped dovetailed niche.

It will be apparent that when two fiukes and a shank having the aforementioned characteristics are placed in firm assembly with one another, the conical bearing surface referred to will be defined by a plurality of radially spaced angularly inclined arm portions. Thus, after the fiukes are placed in the undercut recess or niche and assembled with a cooperating shank memher, the anchorage device will be firmly secured in the concrete and cannot be withdrawn there- .from.

If desired, the niche or recess may be subsequently filled with additional mortar, thereby embedding the fiukes of the anchorage device in the concrete.

A concrete wall adapted in accordance with the The shank is then inserted; between the opposing fiat apertured base porfeatures of the present invention is thus admirably suited to firmly anchor brick-type masonry adjacent the wall. By arranging the niches or recesses in a predetermined staggered pattern, anchorage devices may be located so as to have their shank portions lie between successive layers of masonry.

The extending shank of the anchorage device may also be advantageously employed as a pipe hanger and, of course, may be readily adapted to anchor stone or support marble or slate slabs and other types of suitable finishing material in proximate firm relationship with a concrete structure.

It is, therefore, an object of this invention to provide a novel and improved method of adapting a concrete surface for architectural treatment.

Another object of this invention is to provide a novel and improved anchorage device which may be used in connection with a fiat concrete surface defining a cooperating dovetail undercut key-recess.

A further object of this invention is to provide an anchorage device made completely from simple stamped metal elements which are economical to manufacture and which may be used with great facility.

, Yet another object of my invention is to provide a reliable method of anchoring finishing material to a concrete surface.

'Itis believed that the methods disclosed by the present invention will be most clearly understood from the description of the apparatus provided for practicing same.

Many other objects and advantages of the present invention will become manifest to those versed in the art through reference to the following detailed description and the accompanying drawings in which:

Figure 1 is a plan view of a flexible disk-type key form used for forming undercut dovetail recesses in plastic aggregates such as concrete and the like;

Figure 2 is a fragmentary cross sectional view showing the key form of Figure 1 attached to the liner surface of a mold form and surrounded in is stripped from the surface of the concrete;

v Figure 4 is a fragmentary end elevational view showing an anchorage device seated in an undercut recess formed by a disk-type key form illustrated in Figures 1, 2 and 3;'

Figure 5 is a fragmentary cross sectional view. partly in section, and partly broken away showing the anchorage device of Figure 4 seated in the undercut dovetailed recess; and

Figure 6 is an exploded view of an anchorage device embodying the principles of my invention.

As shown on the drawings:

Figure 1 shows a flexible disk-type key form indicated generally by the reference numeral Ill. The key form 10 is preferably made of a hard oilresisting rubber material such as neoprene or the like. As shown on Figure 1, the upper face of the key form I is provided with a circular concave recess II and a plurality of radially spaced V-shaped grooves 12 alternately spaced between corresponding radial tongue portions I3.

As may more clearly be seen on Figure 2, the peripheral edge of the tongue I3 is appropriately curved and tapers inwardly to define a substantially skived peripheral edge 14 terminating in a lower circular lip I5.

Thelower face of the key form It) is characterized by a conical recess l6 developed by the angularly inclined walls extending inwardly away from the lip 15. The walls terminate in an an nular recess l1 having a sharply turned radius which operates as a hinge area for pivotal and flexible movement of the lip l and tongues l3 thereabout.

A centrally disposed hub 18 dependsinto the conical recess 16 and away from the annular recess I1, and, by Way of example, may'be formed to define an integral suction cup portion 19 for placing the key form in firm adherence to the liner surface of a mold form 20.

It may be noted'that before being aflixed to a mold form, the hub 18 of the key form 10 normally terminates short of the plane developed by the lip l5, but when pressed against the liner surface of a mold form 20, the lip is resiliently distended so as to produce a tight sealing juncture with the liner surface, thereby precluding the entrance of cement leakage into the conical recess l6 and producing an additional suction effect which tends to maintain the key form In in firm relationship with the liner surface of the mold form 20.

It will also be apparent, that when the li I5'is so'disten'ded, the formation of the concrete lip in the locale of the point of juncture between the key form I0 and the liner surface of the mold form will not be sharpened to' a point, thereby precluding the formation of a sharp, easily fractured concrete lip around the recess.

. As may be seen in Figure 3, when the mold form 20 is stripped away from the surface of the hardened concrete C; the suction cup 19 will remain affixed to the liner surface of the mold form 20 and the lip 15 as well as the tongues 13 will pivotally hinge around the hinge area formed by the annular recess l1. The concave recess II will also aid' in permitting the radial contraction of the key form l0,.thus, the key form 10 may be easily withdrawn from the concrete.

. As withdrawal is effected, the tongues l3 will be displaced radially through the tapered areas defined by the radially spaced grooves l2, thereby adding to the effectiveness and facility of withdrawing the keyform [0 from the concrete simultaneously upon the stripping of the mold 2% suitably apertured as at 260.

4 form 20 away from the surface of the concrete.

After the key form III has been removed, the flat surface of the concrete C will be characterized by an undercut dovetail niche 2| having a plurality of radially spaced fins 22 corresponding to the configuration of the key form Ill.

The fins 22 not only add a decorative effect to the niche or recess 21, but greatly enhance the strength characteristics of the niche inasmuch as the fins 22 serve as radially spaced supports for the lip surrounding the recess 2|.

Turning now to Figure 6 an anchorage device indicated generally by the reference numeral 25 is shown as including a shank 26, a first fluke 21, a second fiuke 28, a screw 29 and a nut 30.

The shank 26 is herein shown as comprising a body portion 26a defining a corrugated pattern along its length and a flattened crown portion It should be understood, of course, that the shank of the instant anchorage device 25 could be widely varied to suit the particular purpose of the user. Although the corrugated body 26a of the instant shank 26 is ideally suited for anchoring masonry work adjacent a concrete wall or for anchoring stone and other building finishingmaterials, it will be readily evident to those versed in the art that other types, of mechanical anchoring structures could be substituted for the shank 26 without departing from the essential spirit of this invention.

Each of the fiukes 21, 28 are identical in construction. Thus, analogous reference characters will be applied to like parts.

It will be seen that the fluke 21 is essentially a bifurcated structure having a flat base portion-21a suitably apertured as at 21b and a pair of shaped arms 21c which extend away from the base 21a.

In this particular embodiment, the arms 210 are bent up from the base 21a so as to lie on angularly disposed planes which intersect the reference plane developed by the base 21a. v

It will be noted that the inner edge 21d of each arm 210 is acutely inclined and tapers outwardly.

Thus, when a fastening means such as a screw 29 is passed through the apertures 21b, 26c, and 28b. and is received by a nut 30, the opposing arms 21c, 280 of the fiukes 21, 28 define a plurality of radially spaced angularly inclined reference points whichsubstantially develop a conical bearing surface for cooperative locking engagement with the dovetailed niche or recess2'l.

In Figures 4 and 5', the anchoring device 25 is shown positioned in a niche or recess 2|.

edges 21d, 28d in bearing registry with the dove--,

It will be apparent that a particularly facilemethod of accomplishing such positioning istoselectively space a pair of fiukes 21, 28 in back to back relationship with the angularly inclined tailed lips of the recess 2I. The shank26 may then be inserted between the opposing base portions 21a, 28a and the various elements may be locked together by means of the screw 29 and;

' the-nut 30. I

It will be noted thatthe crown 26b of the shank 26 does not completely underlie the oppos-' It will also be noted that the insertion of the crown portion 2912 between the opposing base portions 27a, 28a for assembly with a single fastener permits a two way flexibility which tends to spread the load evenly through all four points of bearing engagement developed by the angularly incline'd edges 21d, 28d of the arms 21c, 280.

Although I have resorted to detail in description of my invention for the sake of clarity, it will be readily understood by those versed in the art that many modifications may be suggested without departing from the essential spirit of my invention.

I claim as my invention:

1. An anchorage device for architectural treatment of a concrete surface of the type having dovetailed key recesses therein comprising, in combination, a shank having an apertured crown, a first fluke on one side of said crown and a second fluke on the other side of said crown and fastening means holding said shank and said flukes in firm assembly, each of said flukes having a flat apertured base and a pair of substantially triangularly shaped arms extending away from said base on angularly disposed planes intersecting the plane of said base and together forming a Wedge shape lock, the base portions of said triangularly shaped arms extending radially outwardly towards one end of the anchorage device.

2. An anchorage device for architectural treatment of a concrete surface of the type having dovetailed key recesses therein comprising, in combination, a shank having a corrugated body and a flat apertured crown, a first fluke on one side of said crown and a second fluke on the other side of said crown and fastening means holding said shank and said flukes in firm assembly, each of said flukes having a fiat apertured base and a pair of substantially triangularly shaped arms extending away from said base, said arms having their inner edge acutely inclined to develop a substantially conical bearing surface for 00- operative locking engagement with said dovetailed key recesses in said surface.

3. An anchorage device for architectural treatment of a concrete surface defining dovetailed key recesses comprising, in combination, a shank having a fiat apertured crown, a first fluke on one side of said crown and a second fluke on the other side of said crown and fastening means holding said shank and said flukes in firm assembly, each of said flukes having a flat apertured base engaging said crown and a pair of substantially triangularly shaped arms extending away from said base, said arms having their inner edge acutely inclined to develop a substantially conical bearing surface for cooperative locking engagement with said dovetailed niche, said conical bearing surface more specifically comprising a plurality of radially spaced angularly inclined edges on said arm portions.

4. An anchorage device for use with a concrete member of the type having an undercut dovetailed niche, comprising, a pair of bifurcated flukes, each of said flukes having arms forming a bearing engagement plane adapted to lie in parallel registry with the undercut lip of the niche in the concrete member, a shank having a body portion with an apertured crown, and screw fastening means engaging said apertured crown andlocking said flukes to said shank, whereby said anchorage device may be firmly locked in the niche of the concrete member.

5. An anchorage device for use with a concrete member of the type having an undercut dovetailed niche in the surface thereof, comprising, a pair of locking members, each of said locking members having outwardly extending arm portions together with one another forming a bearing engagement plane adapted to lie in parallel registry with the undercut lip of the niche in the concrete member, a shank having a body portion with an apertured crown, and screw fastening means engaging said apertured crown and locking said locking members to said shank, whereby said anchorage device may be firmly locked in the niche of the concrete member.

ROBERT MAXWELL JAMES.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 182,702 Plank Sept. 26, 1876 777,553 Smith Dec. 13, 1904 947,489 Joseph Jan. 25, 1910 1,709,988 Lampert Apr. 23, 1929 2,279,644 Spalding Apr. 14, 1942 

